Grain-cleaner



(No Model.)

C. R. BOMBOY.

GRAIN CLEANER.

N. PETERS. PhewLmwgmphur, we-nngmn. llc.

- UNTn-D STATES PATENT Orrrcis CHARLES It. BOMBOY, OF HAZLETON, PENNSYLVANIA.

GRAIN-CLEANER.

FE'IFICATION forming part of Letters Patent No. 351,156, dated October 19, 1886.

Application led May 29, 1886. Serial No. 203,596. (No model.)

To all whom, it may concern:

Be it known that I, CHARrns R. BonnoY, a' citizen of the United States, residing in Hazleton, Luzerne county, Pennsylvania, have invented cert-ain Improvements in Grain-Cleanersfof which the following is a specification.

The object of my invention is to construct a machine for rapidly cleaning wheat and other grain by abrasion, and this object I attain by the means which I will now proceed to describe, reference being had to the accompanying drawings, in which- Figure l is a longitudinal sectional View of a graincleaner constructed in accordance with my invention; and Fig. 2, a transverse section of the two screens of the cleaner on the line l 2, Fig. l.

A is a frame-work, of suitable construction, having a bearing for a tubular shaft, B, which carries one end or head, a, of a screen, D, the opposite end of which has an external ring, b, adapted to a bearing in the casing E. The screen D is in the forni of a truncated cone, and is composed of wire-gauze or perforated sheet metal, and is corrugated, as shown, these corrugations extending longitudinally from end to end of the screen.

W'ithin the screen D is another screen, F, similar in general configuration to the screen D, but of somewhat smaller diameter, the heads a b/ of this screen being secured to a shaft, G, which turns at one end in a bearing, d, on the frame A, and at the other end in the tubular shaft, B, of the screen D. The shaft G is driven from any adjacent counter-shaft by means of a belt, adapted to a pulley, c, and said shaft G has a spur-pinion, j', gearing into a spur-wheel, f', on a shaft, y, adapted to suitable bearings on the frame, and having aspurpinion, h, gearing into a spur-wheel, h', Aon the tubular shaft B, t-he wheels and pinions being so proportioned that the screen D will be caused torotate in the same direction as the screen F, but at a much lower rate of speed.

The Wheat or other grain to be cleaned is fed through a spout, H, into a circular hopper, I, on the head a of the screen D, from which hopper it escapes into the screen D and passes down toward the opposite or discharge end of the same through the annular space between the two screens D and F. lVhile traversing the screen the grain is subjected to a continuous rubbing action between the corrugated interior surface ofthe slow-moving outer screen, D, and the similarly-corrugated outer surface of the rapidly-rotating interior screen, F, the result being that the grain is thoroughly freed from any surl'aceimpurity when delivered from the discharge end of the screen D into a box, J, in which it descends in a zigzag course, owing to contact with inclined shelves or partitions fi, the stream of grain being subjected in its passage to currents of air entering openings j, beneath the shelves, so that any Huil' or light impurity escaping with the grain is carried off before the grain reaches the discharge-spout k. The screenings which pass through the meshes of the outer screen, D, fall in the lower portion of the casing E, and are subjected to currents of air entering through the slatted sides lof said casing, so that any light impurities are separated from the screenings before the latter reach the discharge-spout m. The dirt and other impurities which pass through the meshes of the interior screen, F, are conveyed by a spiral vane or creeper, t, to the discharge end of said screen, and are delivered into the box K, in which they are subjected to the action of a rising current of air before being discharged.

The easing E and the boxes K and J are in communication with an air exhausting device-such, for instance, as the rotary fan M, the shaft a of which has a pulley, n', driven by means of a belt, fr, from a pulley, p, on the Shaft: G:

The discharge end of the .screen F is cylindrical for a short distance, and is adapted to a cylindrical opening in the casing ofthe box J, so that said interior screen can be adjusted longitudinally to vary the distance between the same and the outer screen, D, this adjustment being effected in the present instance by a set-screw, N, adapted toa nut, N', on the frame A, this setserew having a forked end engaging with a grooved collar, l?, on the end of the shaft G. The interior screen may, however, be .longitudinally fixed and the outer screen adjustable, and but one screen may be rotated in some instances, or the two lscreens may, if desired, be rotated in opposite directions g but the adjustment of the internal screen IOC with rotating mechanism therefor, and means for adjusting one of the screens longitudinally With respect to the other, all substantially as 2o specified.

4. The combination of the internal and eX- ternal corrugated and perforatedy screens, rotating mechanism, and feeding devices with exhausting mechanism, whereby the matter discharged from the end of the outer screen 25 and the matter passing through the meshes of said screen are subjected to the action of air-l currents, all substantially as specied.

5. The combination of the outer and inner corrugated and perforated screens with mech- 3o anism for' rotating said screens in the same direction, but at different speeds, all substant-ially as specified.

In testimony whereof l have signed my naine to this specification in the presence of 35 two subscribing Witnesses. y

' CHARLES R. BOMBOY.

Vitnesses:

JOHN A. BARTON, CHRISTIAN BAGH'MAN. 

